Tranquility was delivered with a seven-window observationdeck that includes a huge round central window that is the largest ever sent tospace. They will have to use hand-held flashlights since the module?s mainsystems aren?t online. The astronauts are expected to open Tranquility?s doorand move a bulky bench press-like exercise machine inside as one of their maintasks. Great to have everybody on board!? station commander Jeffrey Williamswrote in a Twitter update. ?Today we ingress the new module and get it up andrunning. That grand opening is slated to take place tonight at9:14 p.m. The plumbing lines for its main cooling system haven?tbeen hooked up yet, so astronauts can?t switch on all of its systems.īut they can open the hatch to the module and beginoutfitting it for use on the space station. The module is nearly 24 feet (7 meters) long and aboutthe size of a small bus. The newspace room, called Tranquility in honor of the Apollo 11 landing site, wasattached to the station during an overnight spacewalk that began late Thursday. With Endeavour?s heat shield in the clear, all 11astronauts aboard the linked shuttleand space station can focus on opening the orbiting laboratory?s brand-new roomand fixing a finicky spacesuit fan for a late Saturday spacewalk. A final, standard inspection of Endeavour?s heat shield willbe conducted by shuttle astronauts once the orbiter leaves the station nextweek. NASA has kept a close watch on shuttle heat shield healthsince a piece of debris led to the destruction of shuttle Columbia duringre-entry in 2003.